diff --git a/nixos/modules/services/search/elasticsearch-curator.nix b/nixos/modules/services/search/elasticsearch-curator.nix
index 43785c392fee..8cb1275284a3 100644
--- a/nixos/modules/services/search/elasticsearch-curator.nix
+++ b/nixos/modules/services/search/elasticsearch-curator.nix
@@ -82,11 +82,12 @@ in {
   };
 
   config = mkIf cfg.enable {
-
     systemd.services.elasticsearch-curator = {
       startAt = cfg.interval;
       serviceConfig = {
-        ExecStart = ''${pkgs.python36Packages.elasticsearch-curator}/bin/curator --config ${curatorConfig} ${curatorAction}'';
+        ExecStart =
+          "${pkgs.python3Packages.elasticsearch-curator}/bin/curator" +
+          " --config ${curatorConfig} ${curatorAction}";
       };
     };
   };
diff --git a/pkgs/development/python-modules/elasticsearch-curator/default.nix b/pkgs/development/python-modules/elasticsearch-curator/default.nix
index 1ea6e4cabad8..66c124d65a78 100644
--- a/pkgs/development/python-modules/elasticsearch-curator/default.nix
+++ b/pkgs/development/python-modules/elasticsearch-curator/default.nix
@@ -17,11 +17,11 @@
 
 buildPythonPackage rec {
   pname   = "elasticsearch-curator";
-  version = "5.5.4";
+  version = "5.6.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "e75abeb7f7be939b1c64c071898760dc10ab5f08307c253fc074abf8a41a76f0";
+    sha256 = "0r4p229233ivprxnvp33hilkgczijmyvi33wivxhhj6q3kkywpyq";
   };
 
   # The test hangs so we disable it.